It is claimed they through parties with prostitutes at a guesthouse known as the "pink apartments" rented by the charity.

Sources alleged some of the "prostitutes" were girls aged 14-16, below the age of consent.

Paying for sex is banned under Oxfam’s code of conduct and is against UN guidelines for aid workers.

The charity said it did not call police because the state of the country made it “extremely unlikely that any action would be taken”.

Oxfam said it publicly announced an investigation into the allegations when they surfaced in 2011.

However it is alleged the reports did not say the men had been using prostitutes - something the charity denies.

What has Oxfam said about the scandal?

The charity says it disclosed sexual misconduct to the charities regulator.

Dame Barbara Stocking, head of Oxfam in 2011, told the BBC the charity had a long record of having a good code of conduct.

She added new whistleblowing procedures were put in place and said Oxfam often worked in difficult locations where "the rule of law isn't going on".

A spokeswoman for the Charities Commission said: "In August 2011, Oxfam made a report to the Commission about an ongoing internal investigation into allegations of misconduct by staff members involved in their Haiti programme.

"At the time, and based on the information provided, we were satisfied that the trustees were handling matters appropriately and did not have regulatory concerns."

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